Why EU and US Shoe Sizes Differ

Q: Are EU and US shoe sizes the same?

No. EU and US use different scales; use foot length in cm or a trusted converter for equivalents.

Quick answer:

Why European and US shoe sizes use different scales. Regional differences and conversion explained.

This guide explains why eu and us shoe sizes differ and how it relates to shoe size conversion. Use the links below to convert between US, UK, EU, Japanese, and CM sizes.

Conversion references

Use our converters to switch between regional sizes:

Measurement and conversion

For accurate conversion, measure your foot length in cm and use our shoe size converter or specific size conversion pages.

Related size conversions and guides

Quick links to size-pair pages and regional converters (35+ internal links):

Common questions

How should I use this converter?

Pick your region and size, then read the equivalents. When in doubt, measure in centimeters and compare to the brand chart.

Why do sizes differ between countries?

Each region uses its own scale; mapping through foot length (cm) reduces error.

More on Why EU and US Shoe Sizes Differ

See linked guides on this site for measurement tips and regional differences.

Data sources

ISO and regional footwear sizing references (length-based mapping)
Published brand size charts (e.g. Nike, Adidas) for cross-checks—not endorsements
International measurement and apparel sizing studies (public summaries)

Why Sizes May Vary

Shoe and clothing sizes can vary between brands due to manufacturing differences, materials, and regional sizing standards.

Frequently Asked Questions

What is EU 42 in US shoe size?

EU 42 typically converts to US men's size 9 and US women's size 10.5, depending on brand and width. Use any converter on this page when available.

Are EU and US shoe sizes the same?

No. The EU sizing system and US shoe sizing scale use different scales. International shoe size conversion is most reliable when you anchor to foot length in cm.